SAW reflectionless quarter-wavelength transducers
US5028831A · kind A · utility
9Cited by
9References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 4, 1990 |
| Grant date | Jul 2, 1991 |
| Priority date | — |
| Expiry date | Apr 4, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/02842
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A SAW transducer eliminates mechanical energy reflections by using one-quarter wavelength electrodes spaced at predetermined intervals. Dummy electrodes are shifted one-quarter wavelength to cancel energy reflections in the active electrodes. A pair of dummy electrodes is required for each active set of electrodes (the active set comprises one positive and two negative electrodes).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.